syntax error before 'for'

i got error: "syntax error before 'for'" and I just don't understand why? Could you please explain why is that? I have few similar errors in code.

#define N 1024

 void Reverse_Binary( double *a, unsigned long Len);

int main()
   // here is error as well: error: syntax error before '{' token
{
 //here are different variables for all code

 buf = malloc(num_items*sizeof(double));

 //here are different functions

 Reverse_Binary(buf,N); 
}

void Reverse_Binary( double *a,unsigned long Len)  
{
    long x, xprim;
    int temp;

    for (x=0; x<Len; x++)
    {
         xprim= rev(x,N);   

         if (xprim > x)
         {
             temp = a[x];
       开发者_如何转开发      a[x] = a[xprim];
             a[xprim] = temp;s
         }
     }  
}

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You missed the main closing bracket.

Put a bracket after:

Reverse_Binary(buf,N);

} //that's the missing bracket

Also remove the last bracket after Reverse_Binary function.

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Check matching brackets first. When brackets go missing, compiler messages go seemingly awok because the code snippet looks right.

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It looks OK, so the only idea I have that you have maybe invisible CR characters. Some compilers on Unix/Linux do not like files edited on Windows/DOS which contains CR/LF (0x0d, 0x0a) instead of LF (0x0a) as line delimiters. Try editing your file with vi and it may show the supplemental CR as ^M characters at the end of the line.